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PCA9501 Datasheet(PDF) 2 Page - NXP Semiconductors

Part No. PCA9501
Description  8-bit I2C and SMBus I/O port with interrupt, 2-kbit EEPROM and 6 address pins
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCA9501 Datasheet(HTML) 2 Page - NXP Semiconductors

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Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
2003 Sep 12
8 general purpose input/output expander/collector
Replacement for PCF8574 with integrated 2-kbit EEPROM
Internal 256 × 8 EEPROM
Self timed write cycle (5 ms typ)
16 byte page write operation
I2C and SMBus interface logic
Internal power-on reset
Noise filter on SCL/SDA inputs
Active low interrupt output
6 address pins allowing up to 64 devices on the I2C/SMBus
No glitch on power-up
Supports hot insertion
Power-up with all channels configured as inputs
Low standby current
Operating power supply voltage range of 2.5 V to 3.6 V
5 V tolerant inputs/outputs
0 to 400 kHz clock frequency
ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
Latch-up testing is done to JESDEC Standard JESD78 which
exceeds 100 mA
Packages offered: SO20, TSSOP20, HVQFN20
The PCA9501 is an 8-bit I/O expander with an on-board 2-kbit
The I/O expandable eight quasi bidirectional data pins can be
independently assigned as inputs or outputs to monitor board level
status or activate indicator devices such as LEDs. The system
master writes to the I/O configuration bits in the same way as for the
PCF8574. The data for each Input or Output is kept in the
corresponding Input or Output register. The system master can read
all registers.
The EEPROM can be used to store error codes or board
manufacturing data for read-back by application software for
diagnostic purposes and are included in the I/O expander package.
The PCA9501 Active-LOW open-drain interrupt output is activated
when any input state differes from its corresponding input port
register state. It is used to indicate to the system master that an
input state has changed and the device needs to be interrogated.
The PCA9501 has six address pins with internal pull-up resistors
allowing up to 64 devices to share the common two wire I2C
software protocol serial data bus. The fixed GPIO address starts
with “1” and the fixed EEPROM I2C address starts with “0”, so the
PCA9501 appears as two separate devices to the bus master.
The PCA9501 supports hot insertion to facilitate usage in removable
cards on backplane systems.
20-pin plastic SO
-40 to +85
20-Pin Plastic TSSOP
-40 to +85
20-Pin Plastic HVQFN
-40 to +85
Standard packing quantities and other packaging data are available at www.philipslogic.com/packaging.
SMBus as specified by the Smart Battery System Implementers Forum is a derivative of the Philips I2C patent.
I2C is a trademark of Philips Semiconductors Corporation.

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